EP0056477A1 - Reinigung von Äthyl-Tetrahydrofurfuryläthern durch Extraktion mit einer wässrigen Salzlösung - Google Patents

Reinigung von Äthyl-Tetrahydrofurfuryläthern durch Extraktion mit einer wässrigen Salzlösung Download PDF

Info

Publication number: EP0056477A1
Authority: EP; European Patent Office
Prior art keywords: etfe; thfa; ethanol; aqueous; organic phase
Prior art date: 1981-01-15
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Ceased

Application number

EP81110643A

Other languages

English (en)

French (fr)

Inventor

Arthur Chu

Frank Scarcello

Emil J. Walerko

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Honeywell International Inc

Original Assignee

Allied Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1981-01-15

Filing date

1981-12-21

Publication date

1982-07-28

1981-12-21 Application filed by Allied Corp filed Critical Allied Corp

1982-07-28 Publication of EP0056477A1 publication Critical patent/EP0056477A1/de

Status Ceased legal-status Critical Current

Links

VUFKMYLDDDNUJS-UHFFFAOYSA-N 2-(ethoxymethyl)oxolane Chemical compound CCOCC1CCCO1 VUFKMYLDDDNUJS-UHFFFAOYSA-N 0.000 title claims abstract description 41
150000003839 salts Chemical class 0.000 title claims description 4
238000000605 extraction Methods 0.000 title description 22
239000001089 [(2R)-oxolan-2-yl]methanol Substances 0.000 claims abstract description 36
BSYVTEYKTMYBMK-UHFFFAOYSA-N tetrahydrofurfuryl alcohol Chemical compound OCC1CCCO1 BSYVTEYKTMYBMK-UHFFFAOYSA-N 0.000 claims abstract description 36
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 34
239000000203 mixture Substances 0.000 claims abstract description 19
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
239000007864 aqueous solution Substances 0.000 claims abstract description 8
-1 ethyl halide Chemical class 0.000 claims abstract description 5
229910001514 alkali metal chloride Inorganic materials 0.000 claims abstract description 4
150000001340 alkali metals Chemical class 0.000 claims abstract description 4
229910001617 alkaline earth metal chloride Chemical class 0.000 claims abstract description 4
150000003841 chloride salts Chemical class 0.000 claims abstract description 3
FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 24
239000012074 organic phase Substances 0.000 claims description 13
239000011780 sodium chloride Substances 0.000 claims description 13
239000012535 impurity Substances 0.000 claims description 11
UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 10
238000000034 method Methods 0.000 claims description 8
239000001110 calcium chloride Substances 0.000 claims description 7
229910001628 calcium chloride Inorganic materials 0.000 claims description 7
239000008346 aqueous phase Substances 0.000 claims description 4
238000002156 mixing Methods 0.000 claims description 3
238000004821 distillation Methods 0.000 abstract description 5
239000000243 solution Substances 0.000 description 6
HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 5
229960003750 ethyl chloride Drugs 0.000 description 5
238000004817 gas chromatography Methods 0.000 description 4
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
238000009835 boiling Methods 0.000 description 3
239000012044 organic layer Substances 0.000 description 3
239000000047 product Substances 0.000 description 3
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
238000004458 analytical method Methods 0.000 description 2
KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
238000000746 purification Methods 0.000 description 2
102100030695 Electron transfer flavoprotein subunit alpha, mitochondrial Human genes 0.000 description 1
101001010541 Homo sapiens Electron transfer flavoprotein subunit alpha, mitochondrial Proteins 0.000 description 1
TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 1
230000002745 absorbent Effects 0.000 description 1
239000002250 absorbent Substances 0.000 description 1
WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
229910001626 barium chloride Inorganic materials 0.000 description 1
239000003795 chemical substances by application Substances 0.000 description 1
238000004140 cleaning Methods 0.000 description 1
239000012043 crude product Substances 0.000 description 1
230000002939 deleterious effect Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000007710 freezing Methods 0.000 description 1
230000008014 freezing Effects 0.000 description 1
239000004615 ingredient Substances 0.000 description 1
239000010410 layer Substances 0.000 description 1
238000000622 liquid--liquid extraction Methods 0.000 description 1
229910001629 magnesium chloride Inorganic materials 0.000 description 1
239000000463 material Substances 0.000 description 1
VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 description 1
239000001103 potassium chloride Substances 0.000 description 1
235000011164 potassium chloride Nutrition 0.000 description 1
238000011084 recovery Methods 0.000 description 1
239000003507 refrigerant Substances 0.000 description 1
238000005057 refrigeration Methods 0.000 description 1
239000012266 salt solution Substances 0.000 description 1
238000005185 salting out Methods 0.000 description 1
238000005070 sampling Methods 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000011734 sodium Substances 0.000 description 1
239000007787 solid Substances 0.000 description 1
238000000638 solvent extraction Methods 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/04—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
- C07D307/10—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/12—Radicals substituted by oxygen atoms

Definitions

the present invention relates to the purification of ethyl tetrahydrofurfuryl ether (ETFE) from mixtures thereof with tetrahydrofurfuryl alcohol (THFA) and ethanol such as are formed by reaction of THFA, ethyl chloride and sodium hydroxide or sodium.
ETFE ethyl tetrahydrofurfuryl ether
THFA tetrahydrofurfuryl alcohol
ethanol such as are formed by reaction of THFA, ethyl chloride and sodium hydroxide or sodium.
the present invention is designed to purify ETFE of THFA and ethanol. It should be understood that other impurities such as ethyl halide and water can be removed later by distillation or other means.
the present invention includes a method of recovering ethyl tetrahydrofurfuryl ether (ETFE) from mixtures which comprises the steps:
the method of the invention involves purifying ETFE from impurities by repeated extraction with an aqueous salt solution.
the impurities present in crude ETFE include THFA, ethanol and water, and may further include an ethyl halide such as ethyl chloride.
the present extraction process removes both THFA and ethanol, but may not remove other impurities. It is the THFA and ethanol, however, which are difficult to separate from ETFE by distillation.
the salt used for the aqueous solution may be any alkali metal or alkaline earth metal chloride such as lithium chloride, sodium chloride, potassium chlor- a t e , barium chloride, calcium chloride, magnesium chlor- i de or the like.
Sodium and calcium chloride are most preferred, with potassium chloride being next.
Con- cen trations from low levels up to the solubility limit in water may be used, with reasonably concentrated solu- ti o ns being preferred.
Most preferred is aqueous sodium chloride at least 20 weight percent NaCl.
the precise temperatures and volume ratios of aqueous to organic in each extraction are not critical, so long as freezing and boiling of water or organics and salting out of salts are avoided. Room temperature or temperatures up to 70°C are preferred. Mixing ratios from 10:1 to 1:10 are preferred.
the extractions may be conflicted in any conventional equipment for liquid-liquid extraction and may proceed in separate stages or continuously as by countercurrent flow through a column.
THFA removal is a function of the number of extraction stages used. Based on the data for countercurrent extractions in Examples 7-14, the THFA/ETFE ratio can be reduced to 0.0005 with 22 stages and to 0.0003 with 16 stages. Less stages are required on a batch basis with fresh aqueous solutions for each extraction. Thereafter, the organic layer can be fractionally distilled or scrubbed with an absorbent to separate pure ETFE from other impurities (e.g ethyl chloride) and any dissolved water. Since water is an impurity most deleterious to the stability of ETFE-refrigerant mixtures (see U.S. Patent 4,072,027 issued February 7, 1978), the effectiveness of aqueous solutions for purification is considered to be surprising.
impurities e.g ethyl chloride
a crude mixture (100 g) containing 76% ETFE, 21% tetrahydrofurfuryl alcohol and 3% of various impurities including ethanol was mixed with 40 g of a saturated calcium chloride solutions at room temperature. After settling, a 68 g aqueous layer was removed. When these steps were repeated two more times with 40 g saturated calcium chloride solutions, 50 g and 44 g of aqueous solutions were removed. The remaining 68 g organic solution was analyzed by gas chronatography and appeared to contain about 96.6 % ETFE and about 0.25% tetrahydrofurfuryl alcohol or about 0.26% THFA/ETFE. A mass balance showed 220 g in and 230 g out, such that some error was present.
Example 2 The crude mixture (150 g) used in Example 1 was extracted three times with 60 g aqueous sodium chloride solutions to produce aqueous phases of 66 g, 71 g and 68 g. The remaining 130 g organic phase was analyzed by gas chromatography and appeared to contain 89.4% ETFE and 9.2% THFA. Further extractions would be required to achieve the desired purity levels.
Example 4 was repeated extracting 1.4 weight units of the same crude mixture seven times at 55°C with 57.5% CaCl (7.2 weight units for the first extraction, 5.86 weight units for each subsequent extraction), with samples taken of each organic layer and analyzed as shown in Table 3.
the product organic leaving the extraction column contained a THFA/ETFE ratio below 0.0005 and an ethanol/ETFE ratio below 0.0005 using 22 trays and 20% NaCl solution.
Using less trays caused higher THFA and ethanol levels in the product, as exhibited in two examples.
Two other examples showed effects due to low NaCl concentration.
the density difference between organic and aqueous feeds became small enough to cause organic entrainment in the aqueous effluent stream.

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Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Furan Compounds (AREA)

EP81110643A 1981-01-15 1981-12-21 Reinigung von Äthyl-Tetrahydrofurfuryläthern durch Extraktion mit einer wässrigen Salzlösung Ceased EP0056477A1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US06/225,289 US4305878A (en)	1981-01-15	1981-01-15	Purifying ethyl tetrahydrofurfuryl ether by aqueous salt extraction
US225289		1994-04-08

Publications (1)

Publication Number	Publication Date
EP0056477A1 true EP0056477A1 (de)	1982-07-28

Family

ID=22844314

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP81110643A Ceased EP0056477A1 (de)	1981-01-15	1981-12-21	Reinigung von Äthyl-Tetrahydrofurfuryläthern durch Extraktion mit einer wässrigen Salzlösung

Country Status (3)

Country	Link
US (1)	US4305878A (de)
EP (1)	EP0056477A1 (de)
JP (1)	JPS57139072A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN105503784A (zh) *	2015-12-15	2016-04-20	新疆诺金化工有限公司	一种工业化超声波反应生产四氢糠醇乙醚的方法及装置

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CN101792426A (zh) *	2010-04-22	2010-08-04	于荣	乙基四氢糠基醚的合成方法
CN101792425B (zh) *	2010-04-22	2012-08-01	新疆科源化工有限公司	乙基四氢糠基醚的合成方法
CN101805315B (zh) *	2010-04-22	2012-11-28	新疆科源化工有限公司	乙基四氢糠基醚合成方法
CN101805314B (zh) *	2010-04-22	2012-10-31	新疆科源化工有限公司	乙基四氢糠基醚的合成方法
US9862694B1 (en)	2015-06-11	2018-01-09	The United States Of America As Represented By The Secretary Of The Navy	Method for the synthesis and purification of ethers
CN105348228B (zh) *	2015-09-28	2024-04-16	尤学民	一种工业化连续生产四氢糠醇乙醚的方法及装置
CN106928165A (zh) *	2015-12-30	2017-07-07	中国石油化工股份有限公司	一种四氢糠基醚类化合物的制备方法
CN113896698B (zh) *	2020-06-22	2024-09-10	中国石油化工股份有限公司	一种四氢糠醇乙基醚的合成方法
CN113896696B (zh) *	2020-06-22	2024-03-12	中国石油化工股份有限公司	一种通过反应法脱除四氢糠醇乙基醚粗产物中四氢糠醇的方法
CN113683586B (zh) *	2021-07-09	2024-03-19	新疆昱华石油化工有限公司	一种四氢糠醇乙醚粗品的精制方法及精制系统

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2000771A (en) *	1977-07-14	1979-01-17	Allied Chem	Alkyl tetrahydrofurfuryl ethers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2153135A (en) *	1937-11-26	1939-04-04	Eastman Kodak Co	Yarn treating processes and compositions therefor
US3940502A (en) *	1972-04-13	1976-02-24	Firmenich & Cie	Flavoring agent

1981
- 1981-01-15 US US06/225,289 patent/US4305878A/en not_active Expired - Fee Related
- 1981-12-21 EP EP81110643A patent/EP0056477A1/de not_active Ceased
1982
- 1982-01-14 JP JP57004808A patent/JPS57139072A/ja active Pending

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2000771A (en) *	1977-07-14	1979-01-17	Allied Chem	Alkyl tetrahydrofurfuryl ethers

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HOUBEN-WEYL, Methoden der Organischen Chemie, Vol. I/1 1958, G. Thieme Verlag Stuttgart (DE) "II. Abscheidung von Flussigkeiten" page 463 * page 463 * *
Journal of the American Chemical Society, Vol. 52, No. 8, August 1930 Washington (US) W.R. KIRNER: "alpha-Tetrahydrofurfuryl Chloride and alpha-Tetrahydrofurfuryl Ethers" pages 3251-3256 * the whole article * *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN105503784A (zh) *	2015-12-15	2016-04-20	新疆诺金化工有限公司	一种工业化超声波反应生产四氢糠醇乙醚的方法及装置
CN105503784B (zh) *	2015-12-15	2018-03-20	尤学民	一种工业化超声波反应生产四氢糠醇乙醚的方法及装置

Also Published As

Publication number	Publication date
US4305878A (en)	1981-12-15
JPS57139072A (en)	1982-08-27

Legal Events

Date	Code	Title	Description
1982-05-29	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1982-07-28	AK	Designated contracting states	Designated state(s): DE GB
1983-04-06	17P	Request for examination filed	Effective date: 19830126
1985-02-06	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED
1985-04-10	18R	Application refused	Effective date: 19841108
2007-08-08	RIN1	Information on inventor provided before grant (corrected)	Inventor name: WALERKO, EMIL J. Inventor name: SCARCELLO, FRANK Inventor name: CHU, ARTHUR

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